Using door as vent

[TTT BBQ]

Hello,

I am current looking into building my second pit and was wonder what formula to use if I want to use my FB door as the inlet vent. My current smoker dosnt pull as well with the door open. Dose this mean I need the door opening to be smaller then the FB to CC opening? Any help would be appreciate.

Thanks
Tom

 

[daveomak]

Standard Reverse Flow Smoker Calculator... by DaveOmak and others... Ready to use.. rev5.. 6/19/15.

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